How to make Breakfast Burrito filling
Mix 6 eggs in a medium bowl with 2 Tbsp of sour cream. Season the mixture with salt and pepper. Mix in the ham strips and place in a bowl.
Place 1 Tbsp of oil in a large skillet and heat on medium heat. Stir in the sliced mushrooms. Sauté until golden (5 minutes), turning occasionally. Season with salt and pepper, then take out the mushrooms.
Heat 1 Tbsp butter in a skillet. Add egg mixture to the skillet. Stir/scramble the eggs until they are cooked through (about 3 minutes). Set aside.
Assembling Breakfast Burritos:
Spread 1 Tbsp of sour cream on the tortilla's center. Top it with 1/6 of the cooked eggs and shredded mozzarella cheese. If desired, add 1-2 Tbsp chopped tomatoes. Do not over-stuff them as they will become difficult to roll.
Roll the burrito top-to-bottom. Wrap the top flap tightly over the filling. Fold the edges in tight and seal the seam with the bottom flap. Continue with the remaining burritos.
To Heat Burritos:
Heat 2 tablespoons oil in a large skillet on medium heat. Place the thawed or fresh burritos on a large skillet over medium heat. Fold them in half and cook on both sides for 2 minutes. Add more oil if necessary.