Cook the pasta according to package instructions until al dente. Drain and set aside, reserving ½ cup of pasta water.
In a large skillet, heat the olive oil over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant.
Add the cherry tomatoes to the skillet and cook for 3-4 minutes until they start to soften.
Stir in the fresh spinach and cook until wilted, about 2 minutes.
Add the flaked canned salmon, dried oregano, salt, and pepper. Gently mix to combine and heat through.
Pour in the lemon juice and reserved pasta water, stirring to create a light sauce.
Add the cooked pasta to the skillet and toss everything together until well combined.
Serve warm, topped with grated Parmesan cheese and fresh parsley.