In a large skillet on medium heat, add in the olive oil and the breakfast sausage. Cook until partially done, stirring frequently. Add in the bell peppers and onions and cook until the sausage is completely cooked through, and the vegetables are soft. Set aside.
Place 1/6 of the mixture down the center of a tortilla and top with ¼ cup of shredded cheese. Roll up and place seam side down in the baking dish. Repeat until all tortillas are filled.
In a medium bowl beat eggs, half and half, and flour. Pour over the tortillas in the baking dish. You can cover the dish and place in the fridge overnight or bake immediately.
When ready to bake, uncover dish and sprinkle remaining shredded cheese over the tortillas. Cover baking dish and bake for 35 minutes at 350 degrees F. Uncover dish and bake 10 minutes longer or until set and cheese is melted.
Garnish with green onions or chives, if desired, and serve warm. Enjoy!