Spinach and Cheese Toaster Pastries - The Scramble

Ingredients

• 1/2 Tbsp. extra virgin olive oil
• 1/2 yellow onion (chopped about 1/2 cup)
• 1 clove garlic (minced)
• 10 oz. chopped frozen spinach
• 1/4 cup crumbled feta cheese
• 3/4 tsp. salt (divided)
• 1/4 tsp. black pepper
• 1/8 tsp. nutmeg
• 2 1/4 cups cups whole wheat flour (I like the white whole wheat from King Arthur Flour) (use wheat/gluten-free, if needed)
• 16 Tbsp. unsalted butter (2 sticks)
• 1 egg (beaten with a little water)