Heat the oven’s broiler on high and line a rimmed baking sheet with foil. Set aside.
Toss the zucchini with avocado oil and broil on high for 15-20 minutes, cut side facing up until lightly charred all over.
While the zucchini roasts, bring the broth, gelatin, and sun dried tomatoes to a simmer in a small pot over medium-high heat. Boil to reduce the liquid until about 2 tablespoons are left.
Transfer zucchini to a serving dish, spoon the sauce over top, sprinkle with feta, if using and oregano.