In a small bowl, whisk together the BareOrganics Matcha Powder and tahini until smooth. Add honey, lemon juice, warm water, olive oil, garlic, salt, and pepper. Whisk until creamy and fully combined, adding a little more water if needed to reach a pourable consistency.
Place the mixed greens in a large serving bowl. Arrange the avocado slices and orange segments over the greens. Sprinkle with feta cheese, pumpkin seeds, and red onion.
Drizzle the matcha vinaigrette over the salad just before serving and gently toss to combine. Serve immediately.