1Heat oven to 425ºF. Place bread slices in ungreased jelly roll pan, 15 1/2x10 1/2x1 inch. Bake 3 to 5 minutes or until crisp. Remove from pan.
2Spray same pan with cooking spray. Toss asparagus with oil; place in pan. Bake 6 to 8 minutes or until crisp-tender.
3Mix mustard and honey; spread over each bread slice. Cut asparagus into pieces to fit bread; place 2 or 3 pieces on each slice. Top with onion, cheese and dill weed. Place in pan. Bake about 5 minutes or until hot and cheese is melted.