Bologna is not a good protein source to regularly include in your diet. It is high in preservatives, saturated fat, fillers and has very little protein.
This is the nutrition facts for 100g of bologna:
[TABLE="class: _yX, width: 2"]
[TR]
[TD="class: _rhe kno-fb-ctx"]
[/TD]
[/TR]
[TR="class: kno-fb-ctx kno-nf-cq"]
[TD]Calories 247[/TD]
[/TR]
[/TABLE]
[TABLE="class: _yX, width: 2"]
[TR="class: _fDd"]
[TD="class: _VLb, colspan: 2, align: right"]% Daily Value*[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Total Fat 20 g[/TD]
[TD="class: ellip _Igc, align: right"]30%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip _hDd"]Saturated fat 7 g[/TD]
[TD="class: ellip _Igc, align: right"]35%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip _hDd"]Polyunsaturated fat 2.1 g[/TD]
[TD="class: ellip _Igc, align: right"][/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip _hDd"]Monounsaturated fat 10 g[/TD]
[TD="class: ellip _Igc, align: right"][/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Cholesterol 59 mg[/TD]
[TD="class: ellip _Igc, align: right"]19%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Sodium 907 mg[/TD]
[TD="class: ellip _Igc, align: right"]37%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Potassium 281 mg[/TD]
[TD="class: ellip _Igc, align: right"]8%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Total Carbohydrate 0.7 g[/TD]
[TD="class: ellip _Igc, align: right"]0%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip _hDd"]Dietary fiber 0 g[/TD]
[TD="class: ellip _Igc, align: right"]0%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip _hDd"]Sugar 0 g[/TD]
[TD="class: ellip _Igc, align: right"][/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Protein 15 g[/TD]
[/TR]
[/TABLE]
It is not a good protein source. Try thinly slicing chicken breast and adding that into your sandwich. You could also fry an egg and that is as well. A sliced chicken breast sandwich with a fried egg, lettuce and tomato is delicious!