Instructions
Cook time: 20 minutes
Heat 1 tsp oil in skillet over med + thinly slice ½ of onion; sauté 8-10 min until browned, season with salt + add 2 tbsp water; cover + cook 3-5 min until softened; set aside
Heat lightly oiled large skillet over high; cook burgers with salt/pep 3 min one side; flip over, cook 2 min, then add 1 slice of cheese to each burger; cover pan + cook 1-2 more min until cooked through, no pink remains + cheese has melted
Meanwhile, toast 2 buns until warm + golden; add burgers to buns + top with onions + a handful of spinach—delish!
