In a medium sized pot, heat up your broth and keep it warm next to the pot you're cooking your risotto in.
Heat 2 tbsps of olive oil plus 1 tbsp butter to a dutch oven over medium heat. When the butter melts, add the chopped asparagus, 1/4 tsp kosher salt and saute for 3 minutes.
Add the chopped yellow squash and saute for 3 mins.
Add the peas and saute for 1-2 minutes.
Remove the vegetables from the dutch oven and set aside.
Add 3 tbsps butter to the dutch oven over medium heat and when the butter is melted, add the chopped leeks and 1/2 tsp kosher salt and 1/2 tsp fresh ground pepper . Saute for about 3 mins. Make sure the leeks don't brown. If they start to brown, lower the heat. When they start to soften, add the shallots and saute for about 3-4 more minutes. The shallots will start to get transleucent and soft. Add the garlic and stir in for about 1 minute until fragrant.
Add the rice and stir frequently to ensure the rice cooks evenly for about 2-3 minutes. The edges of the rice will be transleucent and the center will be opaque. Don't brown the rice.
Add 1 cup of wine and stir. Let the rice absorb the wine fully, about 3 minutes. When stirring, just check the bottom of the pan. When you run the spoon through the rice, the bottom will be clear and there isn't pooling liquid. The bottom will be mostly "dry" when the liquid is absorbed. Don't let the rice stick to the bottom...that's too dry.
Stir in 4 cups of hot broth. As it simmers, stir every 4-5 minutes until the liquid is absorbed (About 15 minutes). Next, after the liquid is absorbed and the bottom of the pot is almost dry, stir in 1/2 cup broth. Simmer for 3-4 minutes until the liquid is absorbed once again, stirring occasionally. If it absorbs faster, lower the heat a bit. ***To avoid overcooking the rice, be sure you taste the rice as you go through these next steps to gauge how cooked the rice is. ***
Repeat this process of stirring in 1/2 cup of broth and letting the rice absorb the liquid until the rice is al-dente with a creamy appearance. It should be tender and firm, not crunchy or chalky in the center. Be careful not to overcook it. The risotto shouldn't be gummy or stodgy. If the rice is too thick and sticky, add more broth to loosen it up. It's your choice how loose you like it. Some prefer softer and soupy risotto and some like it creamy and less soupy. If you prefer it a little looser, add more broth until you acheive the desired texture.
Remove from heat and finish it off by adding the lemon jiuice, 1 tbsp of butter and the parmesan cheese. Stir to incorporate. Gently add back the asparagus, squash and peas and fold into the risotto. Sprinkle with parsley and serve immediately.