Preheat oven to 350 degrees. Grease an 8 X 8 or 9 x9 baking pan.) I use a 9 x 13 baking sheet with a one inch lip for thinner brownies.) In a bowl mix by hand the flour, sugar, salt, baking soda, eggs, yogurt or sour cream, vegetable oil, lemon zest and lemon juice. Stir until smooth, about 30 seconds. Spread batter in pan and bake for 20 minutes. Brownies should be cooked through but still light on top. Remove from oven and cool in the pan for 5-10 minutes. Spread glaze over warm brownies.