Preheat a nonstick skillet or griddle pan to high heat. Blister a flour tortilla for 20 seconds, flip. Cover half the tortilla surface with shredded cheese, bits of chorizo or andouille, and chopped scallions. Fold the tortilla in half and cook a minute longer, 30 seconds on each side, pressing down gently with a spatula. Cut quesadillas into 4 wedges and top with salsa.
For salsa, combine ingredients in a small bowl and spoon over wedges of quesadilla, as you snack.