Tuna Pie

Ingredients

• 1 c. all-purpose flour
• 1/2 c. instant potato flakes
• 1/4 tsp. salt
• 1/2 c. margarine, cut up
• enough water to moisten (1/4 to 1/2 c.)
• 3/4 c. instant potato flakes
• 2 Tbsp. chopped pimento
• 1/4 tsp. Tabasco
• 6 1/2 oz. can tuna, drained and flaked
• 1 can cream of mushroom soup
• 1 egg, beaten
• 1 c. shredded Cheddar cheese