Heat oven to 425°F. Heat skillet on medium-high, add green beans and 1/4 cup water, cover and cook, shaking pan occasionally, for 3 minutes. Drain beans and transfer to a bowl.
STEP 2
Wipe out skillet. Toss beans with grape tomatoes, Kalamata olives, anchovies, and olive oil, then season with salt and pepper. Return to pan and roast for 8 minutes.
STEP 3
Season salmon fillets with salt and pepper, then nestle among vegetables in the pan. Roast until salmon is just opaque throughout, 10 to 12 minutes.