Cover a baking sheet with aluminum foil and apply cooking spray
Add frozen green beans to cooking sheet. Cover with olive oil and Alpha Rub seasoning. Using your hand or a spatula/spoon, turn the green beans to coat with olive oil and seasoning.
When oven is ready, add pan to the middle rack for 12 minutes.
After 12 minutes, remove pan from oven and again turn the green beans with a spatula/spoon. Place back in oven for 10 minutes.
A this point the green beans are done. If you want them a bit more crispy, add to oven for 5 more minutes.
Notes
For even more flavor, add 2 pieces of bacon thinly sliced and fried to the green beans before roasting.