Cook pasta per instruction.
Prepare vegetables: wash and break cauliflower in small pieces; thaw green peas; slice mushrooms.
Prepare aromatics: slice garlics, finely chop Fresno pepper, zest about 1/2 of lemon.
Sauté shrimps: pat dry shrimps with paper towel and sprinkle 1/4 teaspoon of salt. When the pan is warm, swirl in half of olive oil. When the oil is hot, add garlic and peppers , and cook in medium heat for about 2 minute. When garlics turn golden brown, transfer to a warm plate. Increase the heat to medium high and add shrimps to the pan, and cook both sides, about 2 min. each. Set them aside in the same, warm plate.
Sautee mushrooms: In the same pan, swirl in the rest of olive oil and add mushrooms. When the mushrooms are lightly coated with oil, add white wine, and cook for another 2 minutes.
Make cheesy sauce mix: warm milk to a little higher than lukewarm temperature - in a regular microwave, for 1-1/2 cup of milk, it will take about 2 minutes. Cube brie in small pieces (I use every pat of it, but you can remove rind if you prefer a softer texture) and add to a medium sized bowl, along with the warm milk. Crush crackers in small pieces and add to the sauce.
Put them all together: Set the oven temperature to 400. In a bowl with the sauce, add in pasta, 1/4-teaspoon of salt, and sautéed aromatics, shrimp, and mushrooms. Also add in green peas and cauliflower. If you like a softer texture for the cauliflower, you can blanche for 30 seconds. Mix them well so that all the ingredients are coated well with the sauce.
Ready to bake: In a lightly greased baking dish (this time I used a 11" Nambe bowl and any small to medium baking dish - 9x12 or smaller - will work just fine), lay the pasta mix evenly. Sprinkle oregano. Grate the swiss cheese over the surface, and bake for about 20 minutes, until the sauce is bubbling.