Peel and cube the sweet potato, then steam or boil until tender, approximately 12-15 minutes.
Drain the sweet potato and mash thoroughly until smooth, seasoning with a pinch of salt and pepper.
Pat the salmon fillet dry with a paper towel and season both sides with salt and pepper.
Heat half of the olive oil in a non-stick skillet over medium-high heat.
Place the salmon in the pan skin-side up and sear for 4-5 minutes until golden brown, then flip and cook for another 3-4 minutes until cooked through.
In a separate small skillet, heat the remaining olive oil over medium heat and add the minced garlic, sautéing for 30 seconds until fragrant.
Add the green beans to the garlic skillet and sauté for 4-5 minutes until crisp-tender.
Plate the sweet potato mash, top with the seared salmon, and serve the green beans on the side.
Finish the dish with a fresh squeeze of lemon juice over the salmon.