1Preheat oven to moderate 180 C.
2Cook paste following packet instructions. Drain.
3Mean while, in a frying pan, heat oil on medium. Sautè bacon, onion, garlic 4-5 mins, until onions softens.
4In a medium saucepan, melt butter on medium heat. Add flour and cook 1 min, stirring. Gradually whisk in milk. Cook 3-4 mins, stirring, until boils and thickens. Stir in parmesan and juice.
5In an 8-cup-capacity baking dish, combine pasta with bacon mixture, tomatoes and salmon. Toss through sauce.
6In a food processor, pulse bread to a fine crumb. Add parsley and pulse to chop well. Sprinkle over pasta mixture in dish. Bake 10-15 mins, until topping is golden.
Top Tip: Any leftover mashed potato makes a delicious topping underneath the breadcrumb layer.
Photo: Rodney Macuja/Bauer