Preheat the oven to 180 degrees C. Lay 4 sheets of tin foil - just larger than a wrap - on your kitchen counter.
Crack one of the eggs into a bowl. Add a pinch of salt and pepper and whisk with a fork.
Heat one teaspoon of olive oil in a nonstick frying pan. Pour in the egg and move the pan around until the egg coats the bottom. Sprinkle over 25g cheese then press one of the wraps on top. Cook for 20 seconds, then ease out of the pan and lay egg side up on one of the sheets of foil. Replace with the other three eggs and wraps.
Chop the mushrooms into small cubes. Do the same with the red bell pepper. Slice the sausages.
Sprinkle one mushroom, quarter of the pepper and one sausage in a line on top of one of the wraps. Top with 2 teaspoons of soured cream. Wrap the burrito and wrap the foil tightly around it. Repeat with the other three burritos.
Put the burritos in the oven and cook for 5 minutes, until warmed through.