Pasta with Spinach and Chickpeas
1 (10 ounce) bag baby spinach leaves, chopped 1 (15 ounce) can garbanzo beans (chickpeas), … 1 (16 ounce) package linguine pasta 1 tablespoon sea salt, divided 1 teaspoon chopped fresh marjoram, or more to… 2 cloves garlic, minced 2 tablespoons extra-virgin olive oil, or more… 3 large tomatoes, seeded and diced freshly ground black pepper to taste ¼ cup freshly grated Pecorino-Romano cheese, … ½ teaspoon red pepper flakes, or more to tast…