In a small bowl, combine curry powder, garlic powder, salt, black pepper, paprika, and lemon juice.

Preheat oven to 350 degrees Fahrenheit.

Place chicken breast in a baking pan.

Rub the chicken with the prepared spice rub.

Bake for 30-35 minutes, or until chicken juices run clear.

While the chicken is baking, prepare spaghetti according to package directions.

Heat olive oil in a large frying pan.

Add sliced button mushrooms and sauté until golden brown.

Add sliced red onion and chopped garlic to the pan.

Continue to sauté for another 1-2 minutes until softened.

Drain the cooked spaghetti.

Add the drained spaghetti to the pan with the sautéed vegetables.

Slice the baked chicken into pieces.

Top the spaghetti with the sliced chicken.

Drizzle a little olive oil over the dish.

Add lemon juice and toss to combine.

Serve immediately.