Cook rice according to package directions. In a large skillet, saute peas in butter and honey until crisp-tender. Add oranges and cashews; cook and stir 1 minute longer.
Brush tuna with 2 tablespoons marinade. Moisten a paper towel with cooking oil; using long-handled tongs, rub on grill rack to coat lightly. Grill tuna, covered, over high heat or broil 3-4 in. from the heat for 3-4 minutes on each side for medium-rare or until slightly pink in the center.
Brush tuna with remaining marinade; serve with rice and snap pea mixture. Yield: 4 servings.