Preheat oven to 350 degrees F.
In a saute pan over medium-high heat, add 2 tablespoons oil and the chicken sausage, onions, jalapenos, peppers and saute until vegetables have softened.
In medium bowl, mix eggs, milk, paprika and salt and pepper.
Add chicken sausage and vegetable mixture and eggs together. Heat a medium saute pan over medium heat and add 1 teaspoon olive oil, and pour in egg mixture. Cook for 3 minutes on each side, mixture should be slightly firm and moist. In the mean time add tortillas to oven and toast for 3 to 5 minutes until golden brown, then remove.
Remove frittata from pan, place one tortilla on bottom of pan and spread with 1/2 of the cheese, place cooked frittata on top, and top frittata with second tortilla. Top tortilla with remaining cheese and place pan in oven for 5 minutes or until cheese melts.
Remove from oven and garnish with scallions and tomatoes.