Tuna Pasta Bake

WHAT YOU'LL NEED

• 1 Tbsp. (15 mL) margarine
• 1 small onion, chopped
• 1 Tbsp. (15 mL) all-purpose flour
• 1/2 tub (about 1 Tbsp/ 15 mL) Knorr® Homestyle Stock Chicken
• 2 cups (500 mL) water
• 1/2 cup (125 mL) Hellmann's® 1/2 The Fat mayonnaise-type dressing
• 1/4 cup (60 mL) grated Parmesan cheese
• 8 ounces (250 g) bowtie pasta, cooked and drained
• 2 cans (180 g. ea.) tuna, drained and flaked
• 1 cup (250 mL) frozen green peas, thawed
• 1/4 cup (60 mL) coarse or Panko bread crumbs