Making homemade ravioli is simpler than you might think. To start, you’ll need a pasta roller, though a ravioli cutter and ravioli maker also come in handy. Ravioli should be formed just after dough is made, but once shaped, ravioli can be stored in the fridge for several days or frozen for future use. Recipe adapted from Essentials of Italian Cooking by Marcella Hazan and Serious Eats.
Start by making the filling. Preheat oven to 400 degrees F. Brush quartered squash all over with a drizzle of olive oil and sprinkle with a pinch sea salt. Lay squash pieces side down in oven, cover tightly with foil and cook until fork tender, 40 - 50 minutes. Use caution when opening foil – the steam plume can be hot.
To make ravioli dough, on a large lightly floured board or counter, form a flour mound with 3 cups flour and make a deep well in the center. Crack eggs into a bowl, add milk, and tip into flour well. Gently, whisk eggs with a fork. As you go, slowly incorporate more and more flour. Once eggs and flour are fully incorporated, use your hands to fold flour into mixture. Dough should not be sticky at all – continue folding in flour, adding up to 1/2 cup more as needed. Once dough is no longer sticky, clean the work surface with a pastry scraper and knead dough 8 minutes, until it is very smooth to the touch.
Divide into 8 equal pieces. Wrap 6 tightly with plastic and keep at room temperature. Cover 1 of the remaining 2 pieces with a tea towel. Set pasta roller to widest setting. Stretch dough into a 5 x 3-inch rectangle. With widest side parallel to the rollers send the dough through several times. Tighten rollers one notch at a time and repeat. When dough reaches 1/16-inch thick and is roughly a 5 x 13-inch rectangle, lay out on a lightly floured surface and roll the second piece of dough.
If using a ravioli maker, lay sheet of dough across metal ravioli mold. Use the plastic mold to press divots for ravioli filling. Add filling. Top with second sheet of dough. Roll over layers with a rolling pin several time until ravioli are sealed. Turn over, and gently release ravioli from mold. Use a ravioli cutter or sharp knife to separate individual ravioli.
Top with a drizzle of lemon-thyme butter and garnish with remaining tablespoon thyme leaves and minced parsley. Serve right away.