Preheat oven to 350 F. Lightly grease a baking tray with olive oil spray. Place bagged, pre-washed spinach leaves onto the tray in a single layer. They’ll shrink as they cook, though, so don’t worry about crowding the tray. Also, don’t bother drying the leaves if they’re only a little damp. Large leaves work best.
Season with a little salt and a lot of black pepper, maybe some garlic powder. Bake for about 10 mins (turn off the oven but leave the tray in for an extra 5mins for extra crispness).
Verdict: quite delicious!