Cook spaghetti according to package directions. Drain well; reserve 1/2 cup (125 mL) of the pasta water.

Meanwhile, stir the olive oil with the lemon juice and garlic in a microwave-safe bowl. Heat on High in the microwave for 15 seconds or until fragrant.

Tear the salmon slices into bite-sized pieces. Place the smoked salmon, red onion, fresh dill, capers (if using), peas, pepper and lemon zest in a large bowl. Add the hot, cooked spaghetti and toss to combine. Toss with the olive oil mixture and enough reserved pasta water to moisten as needed.

Transfer the pasta to a shallow serving bowl and sprinkle with the crumbled Goat cheese. Garnish with additional dill sprigs.