For the tomatoes
01 -
4 large firm tomatoes, about 10-12 oz (280-340 g) each
02 -
2 cups (90 g) shredded romaine or iceberg lettuce
For the beef filling
03 -
1 lb (450 g) 90 percent lean ground beef
04 -
1/3 cup (50 g) finely diced red or white onion
05 -
2 tablespoons gluten-free taco seasoning
06 -
1/4 cup (60 ml) water
07 -
1/4 teaspoon kosher salt, plus more to taste
08 -
1/4 teaspoon black pepper
For topping
09 -
3/4 cup (85 g) shredded Mexican blend cheese or cheddar
10 -
1/4 cup (60 g) sour cream or plain Greek yogurt
11 -
1/4 cup (60 ml) taco sauce or salsa
12 -
2 tablespoons chopped cilantro, optional