Strawberry Filled Cookies - cooking recipe

Ingredients

2 cups flour
1/4 cup sugar
1/2 teaspoon salt
1/2 lb margarine
1 teaspoon vanilla extract
sesame seeds, as needed
strawberry preserves, as needed

Preparation

Cream butter, add sugar, salt, vanilla and flour.
Form into small balls and roll in sesame seeds.
Make a thumbprint in center of balls.
Fill with strawberry preserves.
Place on cookie sheets and bake at 400 degrees for 10 minutes.
When making cookies, I use parchment paper so I do not have to grease and wash the cookie sheets repeatedly.
I do not know how many this makes and will have to guess.