Classic Layered Salad

8 cups chopped iceberg lettuce

1 small  red onion, sliced, separated into rings

1 pkg. (10 oz.) frozen peas, thawed

1 pkg.  (6 oz.) OSCAR MAYER Smoked Ham, chopped

3/4 cup KRAFT Real Mayo Mayonnaise

1/4 cup  KRAFT Grated Parmesan Cheese

1 Tbsp. sugar

1 cup  KRAFT 2% Milk Shredded Cheddar Cheese

2 small tomatoes, chopped

LAYER lettuce, onions, peas and ham in large straight-sided clear glass bowl.
MIX mayo, Parmesan and sugar; spread over salad to seal. Refrigerate several hours or up to 24 hours.
TOP with Cheddar and tomatoes just before serving; toss gently.