In a large pot melt the ghee and add onions. Cook for about 4 minutes and then toss in zucchini and summer squash. Cook for about 10 minutes until some of the juices are released.
Add the garlic and tomatoes and continue to cook. Stir frequently. Add all the fresh herbs, salt, peppers and juice of 1 lemon. Allow to simmer over low-medium heat till the flavors to meld together. Consistency will be somewhat soupy.
Remove from heat and let rest for 5 minutes. Add the rest of the lemon juice. Season to taste with salt and pepper if desired.