Roasted Butternut Squash, Rosemary, And Garlic Lasagne

• 3 1/2 sheets dry no lasagne (boil)
• 3 lasagne sheets
• 2 shallow baking pans
• 1 rosemary sprigs (garnish fresh)
• 1 sheets dry no lasagne pasta (boil)
• 1 while squash is roasting
• 1/2 stick butter (unsalted)
• 1/2 dice
• 1/2 remaining sauce over pasta
• 1,300 gr butternut squash quartered