3/4 cup plain yogurt
1/4 teaspoon cayenne pepper
1 teaspoon minced fresh ginger root
2 teaspoons grated orange zest
1 pound top sirloin, cut into 1-inch cubes
1 large red onion, cut into wedges
2 large red bell peppers, cut into 2 inch pieces
2 tablespoons olive oil
1 1/2 cups 1-inch fresh pineapple cubes
1 large navel orange, peeled, sectioned
1 tablespoon butter
2 tablespoons brown sugar
1 tablespoon rum