Bring one inch of salted water to boil in a large pot with a steamer insert. Once water is boiling, place green beans in the steamer in an even layer. Cover pot and steam for 7 minutes, or until beans are tender-crisp (recipe notes #1 and #2) With tongs or a slotted spoon, transfer green beans to serving platter (blotting off moisture with a clean kitchen towel if necessary).
Meanwhile, heat butter in a medium skillet over medium heat until sizzling. Add minced garlic; cook and stir until fragrant, about 30 seconds (or longer to mellow the garlic flavor). Remove from heat and season to taste with salt and pepper. Spoon sauce over green beans and garnish with fresh parsley if desired. Serve immediately.
Notes
Test one green bean to see if they are cooked to your liking. Larger green beans will take longer to cook.
Here are a few more options for cooking green beans. Use any of these to replace step 1 of the recipe.
To roast green beans: Toss trimmed green beans in a bowl with a little olive oil, salt and pepper; spread in an even single layer on a parchment lined, rimmed baking sheet. Roast in an oven preheated to 425˚F for 12-15 minutes, depending on the thickness of the beans and how tender you like them.
To blanch green beans: In a wide saucepan or skillet bring salted water to boil, you'll want just enough to cover the green beans. Add beans to boiling water and 4-5 minutes, until bright green and crisp tender.
To grill green beans: Toss trimmed green beans in a bowl with a little olive oil, salt and pepper. In a grill basket or grill pan over medium-high heat, grill, stirring often, for 10-12 minutes, or to your desired level of tenderness.