Peel and dice the sweet potato, then boil or steam until tender, approximately 12-15 minutes.
Drain the sweet potato and mash until smooth, seasoning with a pinch of sea salt if desired.
While the potato cooks, trim the ends of the green beans and mince the garlic.
Heat half of the olive oil in a non-stick skillet over medium-high heat.
Season the salmon with salt and pepper, then place in the skillet skin-side down.
Sear the salmon for 4-5 minutes per side until cooked through and the surface is golden.
Remove the salmon from the pan and set aside to rest.
In the same skillet, add the remaining oil and the minced garlic, sautéing for 30 seconds until fragrant.
Add the green beans to the skillet with a splash of water, cover, and steam for 3-4 minutes until crisp-tender.
Plate the salmon alongside the sweet potato mash and garlic green beans, serving with a fresh lemon wedge.