Preheat oven to 400 degrees F.
Spray the bottom of each flatbread with cooking spray or very lightly brush with olive oil. Place on one large or two medium-sized sheet pans. S[read each flatbread with a thin layer of ricotta, strew with a few leaves of spinach. Arrange mushrooms on flatbread, top with a little gouda cheese. Sprinkle with spice blend of choice.
Bake for 10 to 12 minutes until cheese is melted and bottom is golden brown. Serve immediately.
Note: May be grilled over medium-low heat; melts best if lid is shut. Will only take a few minutes, check it often. After the first time, you’ll get a feel for how it works on your particular grill.