Step 1

Whisk together the flour, sugar, cinnamon, baking soda and salt. Form a well in the center of these ingredients.

Step 2

Whisk together the eggs, oil, vanilla, pineapple, and banana. Pour into the well of the dry ingredients and mix with a wooden spoon or spatula just until incorporated. Stir in the nuts.

Step 3

Divide the batter between 12 muffin tins that have been treated with baking spray and bake in a preheated 375* oven for about 20 minutes, until a skewer inserted removes cleanly.