Arrange a rack in the middle of the oven and heat to 400° F (200º C). Line a rimmed baking sheet with parchment paper, or foil, for easy cleanup later. Spray with cooking spray.
Place potatoes on the baking sheet, and drizzle with 2 tablespoons olive oil and sprinkle with kosher salt and black pepper. Stir to coat with a wooden spoon or silicone spatula, arrange the potatoes to be cut-side down. Bake for 15 minutes.
Meanwhile, pat dry salmon fillets with paper towel. Brush salmon with the old Style Mustard. Set aside.
Toss the broccolini and cherry tomatoes in a clean mixing bowl with the remaining 1 tablespoon of olive oil and sprinkle with the remaining teaspoon salt and black pepper to taste. Set aside.
After 15 minutes, push potatoes to edges of pan, creating 4 open spaces to place the salmon. Place salmon in the baking sheet. Use tongs to flip the potatoes. Arrange the broccolini and cherry tomatoes on the pan around the salmon.
Bake 15 minutes, or until the salmon is cooked through. Note: if broccolini is browning too much for your liking, simply use tongs to remove and set aside until salmon silicone.Tip: I recommend using a meat thermometer inserted into the thickest part of the salmon fillet to control the salmon doneness. The salmon is ready when the internal temperature reaches 145°F (63°C).
Notes
Potatoes: You can substitute regular potatoes for sweet potatoes. Cut the potatoes into uniform pieces to ensure even cooking.Salmon: Skin on or off is fine.Broccolini: you can use regular broccoli, cauliflower or even asparagus if you prefer.Mustard can be very strong for some people so feel free to add less or more according to your liking.Store salmon in an airtight container in the refrigerator up to 3 days.Variations:This Sheet Pan Mustard Salmon Dinner is super versatile! With simple changes, you can customize this meal to meet family tastes. For example, substitute regular potatoes for sweet potatoes. Instead of broccolini, you can use regular broccoli, cauliflower, or even asparagus.Recipe Tips:
Make sure to coat the salmon fillets generously with mustard for maximum flavor.
Cut the potatoes into uniform pieces to ensure even cooking.
For extra crispiness, place the sheet pan under the broiler for a minute or two at the end of cooking.
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