Blend the cottage cheese, eggs, egg whites, salt, and black pepper until smooth.
Heat the olive oil in a nonstick skillet over medium-low heat and cook the egg mixture for 4 to 5 minutes, stirring gently, until softly set.
Place one tortilla in a clean skillet over medium heat and cover half of it with one-quarter of the egg mixture, turkey bacon, cheese, and spinach.
Fold the empty half of the tortilla over the filling and cook for 2 to 3 minutes, until the underside is golden and the cheese begins to melt.
Flip the quesadilla and cook for 2 more minutes until crisp and fully sealed.
Repeat with the remaining tortillas and filling.
Cut the quesadillas into wedges and serve with salsa.