Creating Green Bean Casserole Bites is simple if you follow these steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Green Beans: Blanch the chopped green beans in boiling water for 3-4 minutes until tender. Drain and set aside.
3. Mix Ingredients: In a large bowl, combine the blanched green beans, cream of mushroom soup, cheddar cheese, crispy fried onions, garlic powder, black pepper, and salt. Stir until well mixed.
4. Prepare Pastry: If using phyllo pastry, layer several sheets together, brushing with a little cooking spray between each layer. Cut into squares large enough to fit into a mini muffin tin.
5. Form Bites: Gently press the pastry squares into the muffin tins, creating little cups.
6. Fill Cups: Spoon the green bean mixture into each pastry cup, filling them generously.
7. Bake: Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until the pastry is golden brown and crispy.
8. Cool: Allow the bites to cool for a few minutes in the pan before carefully removing them to a serving platter.

These steps make it incredibly easy to delight your guests with these incredible Green Bean Casserole Bites!