Pat the salmon fillet dry and season both sides with salt and pepper.
Heat half of the olive oil in a non-stick skillet over medium-high heat.
Once the oil is hot, add the salmon fillet skin-side down (if applicable) and sear for about 3-4 minutes until a golden crust forms. Flip and cook for another 3-4 minutes until cooked through. Remove from the skillet and set aside.
While the salmon is cooking, peel and dice the sweet potato. Boil in a small pot of water until tender, about 10-12 minutes, then drain.
Mash the sweet potato with the remaining olive oil, adding a pinch of salt and pepper to taste. Adjust texture with a splash of water if needed.
Trim the ends of the green beans and steam or lightly boil them for 4-5 minutes until tender yet crisp.
In a small pan, heat a tiny drizzle of olive oil over medium heat, add the minced garlic from the garlic clove, and sauté briefly until fragrant. Toss the green beans in the garlic oil and season with salt and pepper.
Plate the sweet potato mash, top or place the seared salmon alongside, and finish with the garlic green beans. Serve immediately.