Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
Wash and dice the sweet potato into 1/2-inch cubes. Toss with a pinch of salt, pepper, and half the olive oil. Spread on the baking sheet.
Roast the sweet potatoes in the preheated oven for about 20-25 minutes, until tender and slightly caramelized, stirring halfway through.
While the sweet potatoes roast, trim the ends of the green beans. Toss them with a pinch of salt, pepper, and the remaining olive oil. Spread on a separate baking sheet.
Place the green beans in the oven for the last 10-12 minutes of the sweet potato roasting time, until they become crisp and lightly browned.
For the salmon, season both sides with a pinch of salt and pepper. In a small bowl, mix the maple syrup with a few drops of water to thin if needed.
Heat a non-stick skillet over medium-high heat. Sear the salmon, starting skin-side down if applicable, for about 2-3 minutes until a golden crust forms.
Flip the salmon and cook for another 3-4 minutes until the fish is nearly done, then brush generously with the maple glaze during the final minute of cooking.
Plate the maple-glazed salmon alongside the roasted sweet potatoes and crispy green beans, and serve immediately.