Spinach Lasagne
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 28 Jan 2026
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This wholesome spinach lasagne offers a sophisticated twist on the classic Italian favourite. By using a trio of white, red, and yellow onions, the base develops a deep, natural sweetness that pairs beautifully with the earthy spinach and zesty lemon-infused ricotta. It is a vibrant vegetarian dish that prioritises fresh flavours and textures, swapping heavy bechamel for a lighter stock-based sauce and nutrient-dense whole-wheat pasta sheets.
Perfect for a Sunday family lunch or a midweek meal-prep option, this hearty bake is both comforting and health-conscious. The addition of fresh spring onions and dried oregano provides a fragrant herb profile that elevates the dish beyond standard vegetarian fare. Serve it alongside a crisp green salad or some steamed tenderstem broccoli for a balanced, delicious homemade dinner.
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Ingredients for Spinach Lasagne
2 tablespoons olive oil
6 large onions (2 white, 2 red, 2 yellow), halved and thinly sliced
6 cloves garlic, chopped
350ml lowfat chicken or vegetable stock, divided
6 spring onions, thinly sliced
1 tablespoon dried oregano
2 teaspoons salt (preferably sea salt), plus more to season
1 teaspoon freshly ground black pepper, plus more to season
9 whole-wheat lasagne noodles
2 packages (250g each) frozen spinach
1 tablespoon salted butter
1 tablespoon plain flour
1 egg
250g part-skim ricotta
Grated zest of 1/2 lemon
Olive oil cooking spray
240ml grated Parmesan, divided
How to make Spinach Lasagne
Back to contentsHeat oven to 191°C. In a large sauté pan over medium heat, heat oil. Add onions and garlic; toss to coat. Add 240ml stock; cover and reduce heat; simmer until onions are soft, 20 minutes. Reserve 120ml liquid. Add spring onions, oregano, salt and pepper to onion mixture; increase heat to medium and cook, stirring, until liquid evaporates, 20 minutes. Cook noodles as directed on package; drain and blot dry. Cook spinach as directed on package; drain, squeeze dry, and season with salt and pepper. In a small saucepan over medium heat, melt butter. Add flour; stir until roux is brown, 2 to 3 minutes. Add remaining 120ml stock to reserved liquid; whisk into roux until thick, 5 minutes. In a bowl, beat egg; stir in ricotta and zest. Coat a 9" x 13" pan with cooking spray; spread half of stock-roux mixture on bottom. Line pan with 3 noodles; layer on half of onion and ricotta mixtures, half of spinach and 1/3 cup Parmesan. Repeat layer with 3 noodles, remaining onion and ricotta mixtures and spinach, and 1/3 cup Parmesan. Top with remaining 3 noodles, half of stock-roux mixture and 80ml grated Parmesan. Cover with foil; bake until light brown, 50 minutes. Reduce heat to 163°C; remove foil and bake 15 minutes more. Let lasagne sit 15 minutes; serve.
Disclaimer
While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.
Article history
The information on this page is peer reviewed by qualified clinicians.
28 Jan 2026 | Originally published
Authored by:
UK recipe editors
Peer reviewed by
UK recipe editors

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