Prep the sauce. In a small bowl whisk together tahini paste, lemon juice and honey until smooth. Set aside.
Peel off most of the skin off the squash. You don't need to get in the ridges - some skin is ok.
Cut off the ends, cut the squash in half lengthwise and remove all seeds with a spoon.
Slice the squash into ½ inch pieces (half moons).
Place sliced delicata squash in a large bowl, add 1 teaspoon olive oil and all the spices (salt, cumin, paprika, garlic powder and garam masala or pumpkin spice, if using). Toss together to coat.
Heat up the remaining 1 tablespoon of oil in a large skillet.
Add sliced squash in one even layer and sauté on medium or medium-low for 5 minutes. Turn and repeat on other side. Cook, turning until the squash turns golden brown and nearly transparent, and can be effortlessly sliced with a butter knife. For my squash it took about 13 minutes total.
Transfer the cooked squash to a bowl or serving platter.
Drizze with tahini lemon sauce and sprinkle with chopped pistachios, parsley and feta cheese. Serve warm or at room temperature.