Bring a large pot of water to a boil and add a tablespoon of salt.
Add the green beans to the boiling water and let them cook for 2 to 4 minutes, until they reach your desired tenderness.
Remove the green beans from the boiling water and stick them in a bowl of ice water (to stop the cooking process). This method is called blanching the beans.
It's great because it works really well for cooking beans thoroughly, but you can still add flavor on the stove top. Don't skip this step.
When the beans are cold, dump them into a strainer and then pat them dry with a clean tea towel.
In a large skillet over medium heat, warm the olive oil and butter.
When the butter is melted, add the minced garlic and stir until the garlic is fragrant, about 15 seconds.
Add the green beans, salt, and pepper, and stir to coat the green beans in the butter and garlic mixture.
Cook for 3 to 4 minutes, until the green beans are hot and well-coated in the butter. Adjust the salt to taste and serve right away.
Notes
Make sure you get good quality green beans. I bought mine a few days before I planned on using them, and that was a mistake this time of year; lots went bad in the fridge.
If you want to make this recipe dairy-free or vegan, you could omit the butter and use extra olive oil.
Boiling the green beans before you sauté them is worth the extra bit of effort because it results in the best texture.