Preheat the oven to 430°F/222°C.
Cut the pumpkin in slices and toss with olive oil, salt, and pepper.
Spread the seasoned slices on a baking tray and bake for 20 minutes. Remove from the oven, flip the slices over, and bake until golden but not mushy, about 5 minutes.
Toast pine nuts in a dry frying pan over medium heat until nuts are light golden and smell nutty. Set aside.
Slice the bell pepper into slices and set aside.
Whisk olive oil, balsamic vinegar, honey, salt, and pepper together in a small bowl and set aside.
On a dinner plate, arrange baby spinach leaves, sliced bell pepper, and roasted pumpkin. Top with crumbled feta cheese and toasted pine nuts.
Drizzle with olive oil dressing or use your favorite.