Begin by prepping all ingredients: rinse the salmon and pat dry, trim the ends of the green beans, peel and cube the sweet potato, and mince the garlic.
Place the sweet potato cubes in a small pot of boiling water and cook until tender, about 10-12 minutes.
While the sweet potato cooks, heat the olive oil in a non-stick skillet over medium-high heat. Season the salmon fillet with salt and pepper.
Sear the salmon for about 3-4 minutes on each side, until it achieves a crisp exterior and is just cooked through. In the last minute of cooking, add the minced garlic to infuse flavor.
In another pan, lightly sauté the green beans with a small drizzle of olive oil and a pinch of salt (and additional minced garlic if desired) until they are crisp-tender, about 4-5 minutes.
Drain the sweet potatoes and mash them with a fork. Add a pinch of salt and a few drops of olive oil if needed for extra creaminess.
Assemble the plate by placing a generous serving of sweet potato mash, topping it with the seared salmon, and arranging the garlic green beans on the side. Serve immediately.