Heat olive oil in a medium saucepan over medium high heat
Add cut up chicken thigh to the saucepan and cook for 3-4 minutes until browned. Remove from saucepan and set aside for later.
Add diced onion to the oil remaining in the saucepan, along with 1 teaspoon of salt, and sweat onions for 4-5 minutes until softened. Add in the minced garlic and cook for another minute.
Empty in the canned tomatoes and rinse out the can with the 1/4 cup of water. Add in dried rosemary, dried thyme, dried basil and freshly cracked black pepper.
Bring sauce to a boil then reduce heat to low and simmer uncovered for 25-30 minutes, until thickened and not much liquid remaining.
Meanwhile preheat oven to 400°F/200°C and prepare pasta by cooking in salted boiling water for 1 minute less than package instructions. (Note 2)
Once sauce has finished cooking add the cooked chicken and frozen vegetables in. Stir to combine
Combine the chicken, vegetable and sauce mixture with the cooked pasta in a baking tray and top with cheese. Cook in the oven for 20-25 minutes or until cheese melted and starting to brown
Let pasta bake cool for at least 15 minutes before cutting into squares and serving. (Note 3)