1 (15 oz.) can condensed milk
1/2 c. lemon juice
1 tsp. grated lemon rind
1 1/2 c. flour
1 tsp. baking powder
1/2 tsp. salt
2/3 c. butter
1 c. brown sugar
1 c. uncooked oatmeal

Blend together milk, juice and rind of lemon and set aside. Sift together flour, baking powder and salt. Cream shortening. Blend in sugar. Add oatmeal and flour mixture and mix until crumbly. Spread half into an 8"x12"x2" greased pan and pat down. Spread milk mixture over top and cover with rest of crumb mixture. Bake at 350 degrees until brown around edges, about 25 minutes. Cool in pan at room temperature for 15 minutes. Cut into squares. Chill in pan until firm.