Start by preheating your oven to 400 degrees Fahrenheit. While the oven is warming up, wash your green beans thoroughly and trim off the stem ends. Prepare a large baking sheet by lining it with parchment paper or a silicone mat to prevent any cheese from sticking later on.
Bring a large pot of water to a boil and add the green beans for about 3 minutes. This quick blanching ensures the beans are perfectly tender once the turkey bacon is done cooking. Immediately transfer the beans to a bowl filled with ice water to stop the cooking process, then drain them and pat them dry with a clean kitchen towel.
Take about 6 to 8 green beans and gather them into a neat bundle. Take a half-slice of turkey bacon and wrap it tightly around the center of the green bean bundle. Place the bundle on your prepared baking sheet with the seam of the turkey bacon facing down to keep it secure during the cooking process.
In a small bowl, whisk together the olive oil, garlic powder, onion powder, salt, and pepper. Use a pastry brush or a spoon to lightly coat each bundle with the seasoned oil. Place the baking sheet in the oven and bake for 15 to 20 minutes, or until the turkey bacon is cooked through and starting to brown.
Remove the baking sheet from the oven and sprinkle a generous amount of shredded cheddar cheese over the center of each bundle. Return the sheet to the oven for another 3 to 5 minutes, or until the cheese is completely melted and bubbly. Serve immediately while hot.