Roasted Acorn Squash Stuffed with Vegetable Biryani Indian Spiced Rice

Name: Roasted Acorn Squash Stuffed with Vegetable Biryani (Indian Spiced Rice)
Ingredients: 4 whole Acorn Squash; 3 Tablespoons Garam Masala; 1 Tablespoon Vegetable Oil; ¼ cups Chopped Cashews; 1 whole White Onion, Diced; 4 whole Sweet Peppers Diced; 1 Tablespoon Coarse Black Pepper; ½ cups Basmati Rice, Soaked; 1 cup Water; 1 pinch Saffron; 4 Tablespoons Biryani Paste; ½ cups Chopped Cilantro, Divided; 1 teaspoon Salt; 1 whole White Onion, Thickly Sliced, For Serving