Marinate your raw chicken in about 1 gram of kosher salt (use half for fine salt) for at least 15 minutes
Heat your pan to medium-high heat and add the unsalted butter.
Once melted, sear your chicken slices, about 1.5 to 2 minutes per side. Be careful not to overcook, especially if using chicken breast as it will become dry. Remove and set aside.
If using fresh shitake mushrooms, saute your mushrooms until cooked through, about 3 minutes. If using canned, continue on the next step.
In the same pan without washing, add your rendered chicken fat or neutral oil and heat to medium heat. Saute your minced onions until translucent, about 2 minutes.
Add in your minced garlic and saute until aromatic, about 1 to 2 minutes. Lower your heat as necessary and be careful not to burn.
If using canned mushrooms, add your drained mushrooms to your aromatics and saute for about 1 to 2 minutes.
Add 2 cups of water to your pan, followed by your ½ chicken or pork cube. Dissolve and let boil. Season with salt to taste.
Add your dry pasta to the water and cook according to package instructions, minus about 1 minute. This is about 6 to 8 minutes. Stir pasta from time to time to prevent from sticking, and add water in increments of 100ml at a time if the water is being absorbed before the pasta cooks. I used about 300ml in total until the pasta was ready.
Once your pasta is al dente, add in your zucchini and toss for about a inute. This will remove the raw taste but keep the texture.
Add cherry tomatoes and toss right before serving to retain texture (or the residual heat from the rest of ingredients will cook it through)
Top with grated parmesan, freshly cracked black pepper, and serve hot.