Tex-Mex
Heat the oil in a large frying pan over medium-high heat, spread out the hash browns and cook for 8-10 minutes, turning once, until golden and crisp. Season and set aside.
In the same pan, cook the sausage for 6-8 minutes, breaking it into small pieces, until browned and cooked through. Drain off the excess fat and set aside.
Whisk the eggs with a pinch of salt and pepper. Melt the butter in the pan over medium-low heat and cook the eggs, stirring, for 2-3 minutes, until softly set.
Warm the tortillas in a dry pan for about 1 minute so they are soft and pliable.
Divide the eggs, potatoes, sausage, grated cheddar and salsa between the tortillas, placing them in a line down the center.
Fold in the sides, roll up tightly and toast seam side down in the hot pan for 2 minutes to seal.