Cook the fettuccini pasta till al dente in salted boiling water. Drain and set aside.
Grind together the garlic cloves, onion, jalapeño pepper, yellow mustard seeds, salt, cilantro and parsley.
Sauté the shrimp with the ground spices in 2 tbs olive oil.
Prepare a smooth white sauce in another pan by whisking the flour in melted butter and slowly adding milk on low heat until it is smooth.
Add the white sauce to the sautéed shrimp in the pot. Mix well. Spoon in 1 tsp dijon mustard, black pepper, add some water if too thick then toss in the grated mozzarella cheese.
Sprinkle some lemon juice and simmer for 2 minutes. Adjust the salt then pour it on top of the cooked fettuccine pasta and serve hot with sautéed veggies on the side. Enjoy.