Jam Filled Muffins

2 cups flour
½ cup sugar
1 Tablespoon baking powder
½ tsp. cinnamon
½ tsp. salt
2 eggs, beaten
½ cup milk
½ cup butter, melted or oil
Jam filling

Streusel:
¼ cup chopped nuts
3 Tablespoons flour
3 Tablespoons sugar
3 Tablespoons butter, room temperature

Prepare muffin tins by spraying with Pam or use paper liners.  Preheat oven to 400 degrees.  Combine streusel ingredients, using a pastry blender or fork to make a crumb mixture.     In a mixing bowl, combine dry ingredients.  In a separate small bowl, combine eggs, milk and melted butter, then stir into dry ingredients.  Fill each muffin tin about 2 Tablespoons  of batter, making a small indentation, place a teaspoon of jam on each center and cover with the rest of the batter.   Sprinkle with streusel crumb mixture. Bake 15 to20 minutes.