Heat oven to 425 degrees. Line a large rimmed baking sheet with silicone or parchment.
Add green beans to prepared pan (if frozen, no need to thaw). Drizzle with oil and sprinkle any seasonings you will be using. **If you'd like to add garlic, onions, peppers, etc. add them here.**
Toss everything together well with hands or spoon, making sure to coat most of the beans with oil and seasonings. Spread in an even layer to the edges of the baking sheet.
If using bacon, cut up the pieces now and let them fall over the top of the seasoned green bean layer. Do not stir in.
Place the pan in the oven and roast for 10 minutes. Stir the beans well, making sure the edge pieces get moved toward the center, and spread again in an even layer. Roast for 5 to 10 minutes more or until some of the beans are starting to char in places and the beans are done to your liking.
Serve warm or at room temperature.
Notes
TIP: Make a big batch at the beginning of the week and add to meals all week (they are especially good added to grain bowls).Nutrition Note: The values were calculated with only the beans, oil and seasonings (all the other options are variables).