First, preheat the oven to 375. Slice the butternut squash in half and scoop out the seeds. Then fill a glass baking dish with 1/2 an inch of water to prevent the dish from burning. Then place the squash flesh side down in the water and pop in the oven for 1 hour.
For the ravioli dough, combine the flour and salt and dump them out on a clean surface. Make a well in the middle of the flour and crack 4 of the eggs into the well. Slowly combine the eggs and flour, kneading as you go and adding flour as necessary, to form the dough. Once the dough is in a ball, wrap it in plastic wrap and place in the fridge for 30 minutes.
While the dough is chilling, make the filling. Combine the ricotta, garlic and parmesan in the food processor. Pulse until combined, move to a bowl and set aside. Next chop some of the sage (about 1-2 tbsp once minced) and combine with the ricotta mixture.
Once the dough has been chilling for 30 minutes, remove it from the fridge and cut it into two equal parts. Place on a floured surface and roll each half into a thin sheet. This is where a pasta maker comes in handy, but if you're like me and don't have one, a rolling pin will suffice! Just make sure you get it as thin as possible.
Once each sheet is rolled out, cut out the individual ravioli pieces of comparable size. A biscuit cutter will work as will just cutting the dough into squares.
At this point, the butternut squash should be done. Remove from the oven and scoop out the flesh. Add the 1 cup of the cooked butternut squash to the ricotta mixture and mix until combined.
Take half of your ravioli cut-outs and place 1/2 tbsp or so of filling in the middle of each cut-out. Then, crack an egg and whisk with one tbsp of water to create an egg wash. Use this to go around the outside of the ravioli cut-outs, essentially outlining the filling (this will act as your ravioli glue)
Then, place a second cut out on top of the one with filling and press the edges together. Complete for all the cut-outs.
Once your ravioli are complete, add a pot of salted water to the stove. While the water is boiling, add the butter and remaining sage to a skillet. Brown the butter (5-8 minutes constantly stirring). As soon as it turns golden brown, remove from heat and transfer to a bowl. This will be the sauce for the ravioli.
Once the water is boiling, add the ravioli for about 10 minutes or until they rise to the surface. Remove from the water and place in a serving dish. Add the brown butter and sage over top and enjoy!