Recipe ideas come from so many places. This one began after I tasted a cheddar cheese that was infused with horseradish. Cabot makes it, and it’s amazing! The combination of sweet, caramelized onions, with a little kick of heat from chipotle powder and with the sweet-tartness from the quince preserves, is terrific paired with the cheese. Everyone at my house loves it. If you don’t have a horseradish cheddar cheese, you can spread the tortilla with a layer of horseradish mustard and use a plain sharp cheddar cheese. It’s delicious either way.