Directions

1. Heat vinegar, sugar, salt and 1/3 cup water to a simmer in a small saucepan over high heat. Add jalapeños and pineapple to a 24-ounce glass jar with lid; pour hot vinegar mixture into jar and cool completely. Cover with lid; refrigerate at least 12 hours or up to 1 week. Makes about 2 1/2 cups jalapeño mixture.

2. Toss lime juice, onion, cilantro and lime zest in a medium bowl; let stand 10 minutes. Stir  in 1/2 cup drained jalapeño mixture. Makes about 1 cup onion mixture.

3. Spray 1 side of each bread slice with cooking spray. Place 4 slices, sprayed side down, on work surface; top with mashed beans, cheeses, onion mixture and remaining 4 bread slices, sprayed side up.

4. Heat large skillet over medium heat. In 2 batches, add sandwiches to skillet; cover and cook  5 minutes or until bread is golden brown and cheese is melted, turning once and pressing down occasionally with large spatula. Cut sandwiches diagonally in half. Makes 4 grilled cheeses.

Chef Tip:

Use remaining pickled jalapeño mixture for a sweet and spicy kick over your favorite grilled proteins like salmon or chicken breast, or to add an extra level of flavor to tacos or nachos.