
A symphony of textures and Mediterranean flavors come together in this extraordinary focaccia sandwich, where crispy panko-crusted chicken meets vibrant romesco sauce and garlic-parmesan butter. This isn't just another chicken sandwich - it's a carefully crafted combination that transforms simple ingredients into a memorable meal perfect for summer picnics or elegant lunches.
After serving these at a garden party last weekend, guests couldn't stop talking about the romesco sauce. The secret? Using jarred roasted red peppers for convenience without sacrificing flavor.
Essential Ingredients and Selection
- Chicken Breasts: Choose even-sized pieces for consistent cooking
- Focaccia: Fresh, quality bread makes all the difference
- Panko Breadcrumbs: Japanese-style creates superior crunch
- Roasted Red Peppers: Jarred peppers offer consistent flavor
- Sun-dried Tomatoes: Add intense umami to the romesco
- Fresh Herbs: Parsley brings brightness to the garlic butter
Step-by-Step Assembly
- 1. Chicken Preparation
- Slice breasts horizontally for even cutlets, Create three-station breading setup, Maintain oil temperature for perfect crispiness
- 2. Sauce Creation
- Blend romesco ingredients until smooth, Mix herb butter thoroughly, Prepare creamy salad dressing
- 3. Final Construction
- Toast focaccia with garlic butter and parmesan, Layer components strategically, Wrap carefully for transport

Component Preparation Guide
Perfecting each element is essential for creating the ultimate sandwich. For the romesco sauce, blend until smooth while keeping a slight texture for depth. Allow the garlic butter to soften naturally for easy spreading and even flavor distribution. When preparing the salad mix, dress it lightly to maintain its freshness and prevent sogginess.
Make-Ahead Strategy
Streamline your sandwich preparation by making key components ahead of time. The romesco sauce can be mixed and stored for up to three days in advance. Bread the chicken on the day of cooking to ensure the coating remains crisp and fresh. Garlic butter can also be prepared ahead of time, ready to add a burst of flavor when needed.
Storage Solutions
To keep your sandwich components fresh, store each element separately. Sauces should be kept in airtight containers in the refrigerator, while bread is best stored at room temperature to maintain its texture. If you need to store assembled sandwiches, wrap them carefully to preserve their structure and prevent them from becoming soggy.
Serving Suggestions
Enhance your meal with complementary sides that pair beautifully with the sandwiches. A mixed green salad, Italian potato salad, marinated olives, or fresh fruit are excellent choices to round out the flavors and provide a balanced dining experience.
Bread Selection Tips
When choosing focaccia for your sandwich, the right texture and quality make all the difference. Look for a loaf with a well-dimpled surface, indicating good aeration. Opt for a medium-density bread that is sturdy enough to hold fillings but not overly heavy. Avoid overly oily varieties to ensure the sandwich isn’t weighed down or greasy.
My family's secret is adding a pinch of smoked paprika to the panko mixture - it adds depth that complements the romesco perfectly.

After perfecting this sandwich through many iterations, I've found that success lies in the quality of each component and their assembly order. The way the warm, crispy chicken meets the cool, dressed greens while the romesco sauce melds with the garlic-parmesan butter creates a perfect balance of temperatures and textures. Whether packed for a picnic or served at home, this sandwich proves that thoughtful combination of simple ingredients can create something truly extraordinary.
Frequently Asked Questions
- → Can I make the romesco sauce ahead of time?
- Yes! The sauce actually gets better after a day or two in the fridge as the flavors develop. It'll keep for up to a week.
- → What can I substitute for focaccia?
- While focaccia is ideal, you can use ciabatta or any rustic Italian bread that can hold up to the fillings.
- → Can I prepare components in advance?
- You can make the romesco sauce and dress the greens ahead, but fry the chicken and grill the bread just before serving for best results.
- → What's a good substitute for gem lettuce?
- Little Gem lettuce can be replaced with hearts of romaine or butter lettuce - any crisp, sweet lettuce will work.
- → How do I keep the chicken crispy?
- Let the fried chicken cool slightly on paper towels to absorb excess oil, and don't wrap the sandwiches until just before serving.