Heat oven to 400°F in 2 quart saucepan, mix peas and carrots, chicken, potatoes, milk, 1/2 tsp thyme and the soup. Heat to boiling over medium-high heat, stirring occasionally. Divide mixture evenly among 4 ungreased 10 ounce custard cups.
Unroll crescent dough. Place 1 crescent over each custard cup.
In small bowl, mix egg and water. Bursh mixture over dough. Sprinkle 1/8 tsp thyme over dough. Bake 11 to 13 minutes or until crusts are golden brown.