In large skillet over medium-high heat, cook SPAM® Classic 3 to 5 minutes or until browned. Remove from skillet.
Place 1/3 cup rice into musubi press or plastic lined SPAM® Classic can on top of halved nori sheet and press down. Drizzle with Secret Sauce. Top with caramelized onions, lettuce, SPAM® slice and 2 quarters cheese slices.
Wrap nori around each. Moisten one end slightly to fasten together. Repeat to make 8.