Place the noodles in a medium heatproof bowl and cover with hot water. Let them soak for 10 minutes, stirring occasionally to loosen the strands. Drain well and set aside.
Heat a wide sauté pan or wok over medium-high heat. Add 1 tablespoon/15 ml olive oil. Sear the salmon cubes for 1 to 2 minutes per side until lightly browned but still pink in the center. Transfer to a plate.
In the same pan, add the garlic and cook for 30 seconds until fragrant. Add the frozen broccoli and mushrooms. Stir-fry for 5 to 7 minutes until the vegetables are tender and most of the moisture has evaporated.
Return the salmon to the pan along with the drained noodles. Pour in the teriyaki sauce, sweet chili sauce, and soy sauce. Using tongs or a wooden spoon, toss everything together gently until the noodles are evenly coated and the salmon is cooked through, about 2 minutes.
Serve hot, topped with sliced green onions and a sprinkle of sesame seeds.