preheat oven to 350f. in a large nonstick skillet,heat oil add. onion,garlic cook,stirring as needed,until softened,about 5 min
stir in Crabmeat,tomatoes,salsa,pepper;bring to a boil.Reduce heat and simmer,uncovered,,until the flavors are blended,about 3min
spread about 1/2 cup of crab mixture evenly in bottom of a 10/6'' baking pan.place about 1/3 cup of crab mixture on each tortillas;roll up and place them,seam-side down,in pan spoon remaining crab mixture evenly on top;sprinkle with cheeses bake,covered,25 min;uncover and bake until hot and bubbling 10min.