This is the way we do them now.
Cut onion, red and green bell pepper into strips. Also cut your meat into strips. (chicken, steak. obviously don't strip shrimp lol)
Preheat the oven to 400. Mix 2tsp of oil, 2 tsp of chili powder, 2 tsp of cumin, 1/2 tsp of garlic powder or salt, 2tsp of dried oregano, and salt to taste. This is the fajita seasoning
Put all in a baking dish, along with a can of diced tomatoes with green chiles. Mix everything up so the seasoning is on everything
Bake uncovered for 20-25 minutes.
Then serve however you want, on tortillas. I just put sour cream on mine lol.
I used to do mine on the stove, but now that I've tried baking them...never again on the stove! They have SO much flavor now! Here are some I made the other night. Chicken fajitas. I've also tried shrimp, they were just as awesome!