In a large pot, boil the pasta according to the package directions. Set aside.
In a large skillet, heat the oil over medium low. Add the poblano pepper and saute for a minute to soften. Add the salmon, sundried tomatoes, cooked pasta, and lemon juice. Stir to combine. Add the spinach and season with salt and pepper. Turn off the heat and cover the pan for a couple minutes to wilt the spinach.