01 - Set oven to 400°F for roasting vegetables.
02 - Coat zucchini, cauliflower, and Brussels sprouts with olive oil, salt, and pepper. Arrange on baking sheet and roast 20–25 minutes, stirring halfway, until tender and golden brown.
03 - Fry diced bacon in skillet over medium heat until crispy. Transfer to paper towels to drain excess grease.
04 - Whisk together Dijon mustard, apple cider vinegar, minced garlic, lemon juice, 2 tbsp olive oil, salt, and pepper until fully emulsified.
05 - Layer baby spinach evenly across two serving plates.
06 - Distribute roasted vegetables, crispy bacon, and avocado slices over the spinach.
07 - Drizzle mustard vinaigrette generously over salads. Finish with pumpkin seeds and parsley. Serve immediately.