Set oven temperature to 200 degrees F; arrange tortillas on a baking sheet and warm in the oven until ready to serve.
In a large skillet sprayed with non-stick olive oil spray, saute diced onion & bell peppers until soft. Remove from heat and set aside.
Remove casing from sausage and crumble into the same skillet; cook according to package instructions, remove and set aside.
In a large bowl, mix eggs with salt & pepper; pour into skillet and stir, cooking until eggs are firmly set. Remove from heat when cooked through.
To assemble your burritos, spread a thin layer of sour cream on each tortilla and top with even amounts of all ingredients: eggs, peppers & onions, sausage, cheddar cheese, and salsa. Roll and serve.