Prepare the lemon for squeezing and mince the garlic or shallots if you are using them.
Microwave: In a microwave safe dish, place the prepared beans in 2 tbsp of water and heat for 2-3 minutes. Drain, stir and leave uncovered to allow steam to escape.
Stove Top: Bring a pot of water to a boil, have a large bowl of ice water to the side as well. Add the green beans to the boiling water until tender and bright green. Drain the beans in a strainer and then place into the ice water.
Have a large pan over medium heat – add the butter and almonds (also add optional items of garlic or shallot). Cook until almonds begin to brown.
Add the green beans and coat in butter. Cook until warm all the way through. Squeeze lemon juice all over.