Preheat oven to 425°F
Slice flank steak thinly against the grain into strips and add to a bowl with baking soda and water, let sit for 10-15 minutes
Add marinade ingredients (tomato paste, soy sauce, adobo sauce, taco seasoning, oil, and cumin) to the meat and mix
Add diced peppers and onions to a sheet pan and roast at 425°F for 20-30 minutes until softened or charred
Place a wire rack on top of the roasted veggies and layer sliced steak until fully covered
Place under high broil for approximately 8 minutes until meat is browned with charring
Remove from oven and mix meat and veggies together, then add cheese, pico de gallo, and Greek yogurt and mix to combine
Top with additional cheese and cilantro, portion into 12 servings, add to burrito tortillas, roll, and store frozen
To reheat, microwave for 2 minutes then cook in a pan for a few minutes to brown each side
